The enhancement of hot-spot intensity for surface-enhanced Raman scattering (SERS) detection can be achieved through the utilization hierarchical structures comprised surface-accessible plasmonic gold and silver nanoparticles.

Abstract In this study, castor oil (CO) used as bio‐polyol is modified by the transamidation process with diethanol amine to increase hydroxyl group content before water‐blown rigid polyurethane foam preparation. Microcrystalline cellulose (MCC) a natural filler added polymer matrix evaluate reinforced efficiency. Amidated characterized H‐nuclear magnetic resonance (1H‐NMR) and Fourier transform infrared spectrometry (FTIR). The morphology of closed cells studied Scanning electron microscopy...

Abstract The enhancement magnitude of the electromagnetic effects has consistently ranked among highest research priorities in Surface-enhanced Raman scattering (SERS). This study introduces a novel facile synthesis method for zinc oxide nanorice (ZnONR) decorated with small silver particles (ZnONR-Ag). semiconductor-noble nanomaterial is designed to enhance sensitivity and reproducibility when detecting isoprocarb (IPC) crystal violet (CV) at trace levels using SERS. Silver nanoparticles...

In this paper ultrafine copper nanoparticles (CuNPs) were prepared from salt via chemical reduction method with sodium citrate dispersant and polyvinylalcol (PVA) capping polymer. The colloidal CuNPs characterized by using UV-Visible spectroscopy, Transmission Electron Microscopy (TEM), X-ray Diffraction (XRD) techniques. Our obtained results indicated that the produced ranging 2 to 4 nm in diameter. solution at 7 ppm of exhibited a powerful antifungal activity against Corticium salmonicolor...

Spinous nanostructures with long tips could improve the SERS detection of sulfathiazole by creating more hot spots in vicinity particles.

In this study, gold nanostars (AuNSs) were prepared by a facile and environmentally friendly method through the one‐step reduction process with collagen as stabilizing agent. The use of collagen, highly biocompatible protein many functional amines groups, can facilitate simultaneous controlled synthesis surface protecting nanoparticles in one step. This synthetic was operated aqueous solution tetrachloroauric acid (HAuCl 4 ) at room temperature, which ascorbic serves reductive influence...

Developing SERS substrates based on individual gold and silver metals, either with rough surfaces or bare nanoparticles, has certain limitations in practical analysis applications. In order to improve the range of applications noble metallic substrates, a comprehensive approach been proposed for preparing non-traditional nano-substrates by combining tip-enhanced nanostars Raman signal amplification layer. This preparation process is conducted two steps, including tuning sharpness length tips...

This study assessed the controlled synthesis process and efficacy of surface-enhanced Raman scattering (SERS) on two distinct types star-like Au@Ag core-shell nanoarrays. These nanoarrays were designed based gold nanostars (AuNSs) that synthesized with without CTAB surfactant (AuNSs-CTAB, AuNSs-FS). The differences in size morphology these AuNSs creating also studied. To create nanoarrays, a three-step was conducted. That involved nanostars, covered silver layer (AuNSs-FS@Ag AuNSs-CTAB@Ag),...

Triangular silver nanoplates were prepared by using the seeding growth approach with presence of citrate-stabilized seeds and a mixture gelatin–chitosan as protecting agent. By understanding critical role reaction components, synthesis process was improved to prepare triangular high yield efficiency. Different morphologies nanostructures, such nanoplates, hexagonal nanoprisms, or nanodisks, can be obtained changing experimental parameters, including precursor AgNO3 volume, concentration...

This study aimed to address the issue of rapid electron-hole recombination in photocatalysis by exploiting multi-phase TiO

A combined study using the surface-enhanced Raman scattering (SERS) technique and quantum chemical calculations was carried out to elucidate adsorption behavior of sulfathiazole, an antibiotic drug, on gold nanoparticles. The tetrahedral Au20 cluster used as a simple model mimic nanostructured surface. Computations density functional theory with PBE were performed in both gas phase aqueous medium continuum model. drug is found bind Au metals via nitrogen thiazole ring. interaction also...

In recent years, improving the pharmaceutical properties of drug delivery for anti‐cancer treatment has become increasingly important. This is necessary to address challenges related absorption, distribution, and stability. One potential approach solution attach a carrier system, such as functional noble nanomaterials, in order improve control release Core‐satellite nanoparticles (CSN) with an anisotropic morphology have enormous targeted cancer because their large surface area, exceptional...

In this work, gold nanostar (AuNPs) and nanodendrites were synthesized by one-pot environmentally friendly approach in the presence of gelatin. Influence gelatin concentrations reaction conditions on growth branched investigated further. Interestingly, conversion morphology between dendritic nanostructure can be attained changing pH value solution. The role as a protecting agent through electrostatic steric interaction was also revealed. Branched nanoparticles characterized surface plasmon...

Abstract Many studies have shown that capacitance deionization (CDI) has great potential in salt‐water treatment, one of the issues concern many countries, especially Vietnam. The electrode material CDI is essential factors contributing to desalination efficiency this technology, so it research interest. In study, TiO 2 and /carbon nanotubes (CNTs) were synthesized from sol‐gel process utilized as an for desalination. composite materials intensively characterized by X‐ray diffraction, Raman...

Abstract In this work, gold nanorods (AuNRs) with well‐controlled aspect ratios were prepared using a modified seed‐growth method and covered by TiO 2 layers through the hydrothermal reaction to improve stability. Integrating plasmonic rod‐like nanoparticles could enhance their photo activity local surface plasmon resonance (LSPR) effect. AuNRs controlled varying amount of seed solution, reducing agents, surfactant (CTAB), titanium (IV) but oxide. The optical properties formed can be tuned...

Abstract Size and shape of noble metal nanoparticles have a major influence on their linear second order nonlinear properties. Among these nanostructures, acentric objects are expected to display high quadratic responses. In this work, single – step growth gold nanoprisms (GNPs) was achieved by seedless growth. Their harmonic response has been investigated experimentally theoretically with edge length ranging from 40 116 nm for different curvature radii at corners. first...

A novel single-step and template-free procedure, including controlled synthesis of gold flowers (AuNFs), conjugation to a 4-MBA reporter, stabilization with chitosan, is proposed develop the SERS tags-based nanoparticles for trace detection heparin. This assay based on aggregation/non-aggregation balance AuNFs-4-MBA@chitosan nanoparticles, which was induced by adding very low concentration heparin in as-synthesized colloidal solutions. SERS-tag colloids are prepared mixing chitosan HAuCl4...

Abstract Shape control of noble nanomaterials has garnered significant attention in the past decade because niche applications rely on relationship between nanoparticle morphology and optical properties. Although many chemical methods have been reported, there is still a need for improvement terms uniformity, yields, synthesis scale. This work exploited novel modification approach based polyol method to obtain high amount single-crystal silver nanocubes (AgNCs) with relatively homogeneous...

Silver nanoplates (SNPs) are particularly attractive in the surface-enhanced Raman scattering (SERS) activity due to unique physicochemical properties, including localized surface plasmon resonance (LSPR) and strongly electromagnetic “hotspots” at their...

Herein, gold nanoparticle-decorated amorphous carbon (Au/AC) was prepared by reducing chloroauric acid and layering it on carbon. The characteristics of Au/AC were examined using FT-IR, XRD, TGA, SEM, EDS, XPS. To assess its catalytic activity, tested in a reaction involving anthranilamide benzyl alcohol at 110 °C for 24 hours. This yielded various 2-phenylquinazolin-4(3